Promoter hypomethylation of protease-activated receptor 2 associated with carcinogenesis in the stomach

Tomiyasu Arisawa, Tomomitsu Tahara, Tomoyuki Shibata, Mitsuo Nagasaka, Masakatsu Nakamura, Yoshio Kamiya, Hiroshi Fujita, Tamaki Takagi, Shin Hasegawa, Fang Yu Wang, Ichiro Hirata, Hiroshi Nakano

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Background and Aim: Trypsin acting at protease-activated receptor 2 (PAR2) contributes to a progression of malignant tumors. An abnormal DNA methylation has been recognized as an important molecular mechanism for the genesis of various types of cancers. We attempted to clarify the relationship between the promoter methylation of PAR2 and gastric cancer. Method: We estimated the methylation of the PAR2 promoter in both antral non-cancerous mucosa and cancer lesions in 94 patients with gastric cancer. We employed a methylation-specific PCR method. Results: Regarding the methylation ratio (MR) of antral-non-cancerous mucosa, no significant difference was despite among gender, age and Helicobacter pylori infection status, whereas MR increased rising inflammation scores. The MR of cancer lesions was significantly lower than that of antral non-cancerous mucosa. This finding was not dependent on tumor staging, but also histological classification. In venous invasion, lymph node metastasis, or peritoneal dissemination negative cases, this significant lower MR was also seen. Conclusion: The promoter methylation of PAR2 seems to be increased with a progression of chronic inflammation and has an inhibitory effect on carcinogenesis of the stomach.

Original languageEnglish
Pages (from-to)943-948
Number of pages6
JournalJournal of Gastroenterology and Hepatology (Australia)
Issue number6
Publication statusPublished - 06-2007

All Science Journal Classification (ASJC) codes

  • Hepatology
  • Gastroenterology


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